var CreateDiv = function(html){
	this.html = html;
	this.init();
};
CreateDiv.prototype.init = function(){
	var div = document.createElement("div");
	div.innerHTML = this.html;
	document.body.appendChild(div);
};

var ProxySingletonCreateDiv = (function(){
	var instance;
	return function(html){
		if (!instance) {
			instance = new CreateDiv(html);
		}
		return instance;
	}
})();

var a = new ProxySingletonCreateDiv("sven1");
var b = new ProxySingletonCreateDiv("sven1");
console.log(a === b);